Saved pictures do not appear in my folders
You don't specify what platform you are using (Win, MACos, Linux, or something else), but you can find the file using a OS level search. In the file system search engine use the name of file, and if you did not happen to have chosen a unique name for your image file, the date you created the file,  and the OS search facility should provide you the path to which you saved it. With that information, it should be easy to find the file, and perhaps move it to a more desirable location. 

A little preventative effort goes far here. Before you start a project, create a home for it, and store all related elements in that folder as you make them.